Austin Agee signed his inheritance over to his wife

Austin Agee was a brother to my great-grandmother, Viva Lena Agee Edwards.
Their father, Ari Austin Agee, died in 1938. Austin signed over his interest in the inheritance (not that it was a lot of money) over to his wife, Cleo. I’m not exactly sure why he would do this.

ASSIGNMENT OF INTEREST

I, Austin Agee, of full age and under no legal disability, do this 7th day of July 1938, assign, transfer, and _______ any and all interest that I have in the estate of my father Ari Austin Agee, late of the County of Ringgold and the State of Iowa, to my wife, Cleo Agee, for the sum of One Dollar and other valuable consideration, the receipt thereof is hereby acknowledged, and I further authorize the person or person whosoever in charge of his estate to pay my inherited interest to the said Cleo Agee, she having bought my interest in the estate of my father.